similar to: slow network throughput, how to improve?

Hi, I'm trying to disconnect some iSCSI targets, but can't seem to. [root at localhost ~]# iscsiadm -m session tcp: [1] 192.168.2.202:3260,1 iqn.2011.01.22.freenas.nvr:500gb tcp: [3] 192.168.2.200:3260,1 iqn.2011-2.za.co.securehosting:RAID.thin3.vg0.1tba tcp: [4] 192.168.2.202:3260,1 iqn.2011.01.22.freenas.nvr:extent0 tcp: [5] 192.168.2.200:3260,1

Hi, One of our servers has a too small root partition on LVM and needs to be resized. Can / be safely increased online, without a reboot? [root at zaxen02 ~]# lvscan ACTIVE '/dev/LVM01/root' [4.00 GB] inherit ACTIVE '/dev/LVM01/home' [20.00 GB] inherit ACTIVE '/dev/LVM01/var' [4.00 GB] inherit ACTIVE

Hi all, A client just phoned me and said he could not SSH into his VPS, yet he can ping it. So, I login to the host node, and check it out, can''t SSH into. I shutdown iptables on the VPS (via xm console serverza.vm) but still can''t SSH into it. I restart the VPS, still can''t SSH into it. So, I check the host, and found this in /var/log/messages: Jul 22 19:19:07

I have a Dell server with four bonded, gigabit interfaces. Bonding mode is 802.3ad, xmit_hash_policy=layer3+4. When testing this setup with iperf, I never get more than a total of about 3Gbps throughput. Is there anything to tweak to get better throughput? Or am I running into other limits (e.g. was reading about tcp retransmit limits for mode 0). The iperf test was run with iperf -s on the

Promox 4.2 running on 2 nodes + 1 quorum = total 3 servers. All of them have tinc 1.0.24 running. On very rare occasions (every few days or 1~2 weeks), my website hosted on this proxmox node will throw cloudflare 522 connection timed out for few seconds or few minutes: https://support.cloudflare.com/hc/en-us/articles/200171906-Error-522-Connection-timed-out This problem has been driving me

I have two boxes for the purpose of testing traffic control and my knowledge thereof (which is at the inkling stage). The boxes are connected by 100Mbit ethernet cards via a switch. For egress traffic via eth0 I achieve a throughput that is close to the specified CEILing, particularly for values above 1mbit. Ingress traffic does not seem so well behaved. Above about 1mbit rates achieved are

Hi all, Has anyone seen this before? I''m running a CentOS 5.3 with xen 3.0 and the server has been running fine for a long time. In fact, it was up for 186 days before I had to reboot after the "network died", and I couldn''t fix it. The server has multiple domU''s on it, which all still works when the host node (dom0)''s network dies with these

Hi, I am testing tinc for a very large scale deployment. I am using tinc-1.1 for testing. test results below are for tinc in switch mode. all other settings are default. test is performed in LAN env. 2 different hosts. I am getting only 24.6 Mbits/sec when tinc is used. without tinc on the same hosts/link I get 95 to 100 Mbits/sec using iperf. Over Tinc: iperf -c 192.168.9.9 -b 100m -l 32k -w

Hi all, I have a very strange situation, which I can''t explain. On a Core 2Quad server with 8GB RAM, we have 10 xen domU''s, as follows: vps.animalsaregreat.info login: root@zaxen01:[~]$ xm list Name ID Mem(MiB) VCPUs State Time(s) Domain-0 0 512 4 r----- 232.2 actionco.vm

Hi On 6/10/09, James Bensley <jwbensley at gmail.com> Hi all, I don't know what exactly is causing this, but I can't find cron / crontab on my CentOS 5.3 machine. Yes, I know, it's an obvious one, install it. But, it is, according to rpm: [root at zaxen01 ~]# rpm -aq | grep cron anacron-2.3-45.el5.centos crontabs-1.10-8 I have tried yum update crontabs, and then it said there

Hi, I have a problematic CentOS XEN server and hope someone could point me in the right direction to optimize it a bit. The server runs on a Core2Quad 9300, with 8GB RAM (max motherboard can take, 1U chassis) on an Intel motherboard with a 1TB SATA HDD. dom0 is set to 512MB limit with a few small XEM VM''s running: root@zaxen01:[~]$ xm list Name ID

Hi, I have a problematic CentOS XEN server and hope someone could point me in the right direction to optimize it a bit. The server runs on a Core2Quad 9300, with 8GB RAM (max motherboard can take, 1U chassis) on an Intel motherboard with a 1TB SATA HDD. dom0 is set to 512MB limit with a few small XEM VM's running: root at zaxen01:[~]$ xm list Name ID

Hi all, I have an odd problem, for which I couldn't find any suggestions on google. A CentOS 5.7x64 gives me a blank screen on bootup, both to the 17" LCD monitor connected to the VGA port, and to the KVMOVIP device built-into the server, I can see the GRUB boot loader, and everything booting up, upto the point where it says "Waiting for driver initialization.", then it goes

I have built a few sites with Rails, however I have been approached by a company wanting an e-commerce / online shop built. I would love to build one in rails with the knoweledge I now have. I have the agile book and the pickaxe book they are my reference guide. However there is virtually nothing on creating real world e-commerce sites in rails. They will be selling to both businesses and the

Hi, I have just started to work with Xen and have a question regarding the expected network throughput. Here is my configuration: Processor: 2.8 GHz Intel Celeron (Socket 775) Motherboard: Gigabyte 8I865GVMF-775 Memory: 1.5 GB Basic system: Kubuntu 6.06 Dapper Drake Xen version: 3.02 (Latest 3.0 stable download) I get the following iperf results: Src Dest Throughput Dom0 Dom0

connection will remain a TCP connection unless it is broken and restarted. Usually if I stop the client and wait for about 30 seconds to reconnect, there is a much greater chance that the MTU probes work fine, and in about 30 seconds MTU is fixed to 1416. Every time when the MTU probing fails, I see latency between 700 - 1000 ms with 32 byte pings over a LAN. Every time when the MTU probing does

Hi all, Has anyone used TrueCrypt on a XEN based machine before? I'm running CentOS 5.3 with kernel 2.6.18 but when I launch TrueCrypt, it keeps on telling me I need kernel 2.6.24 or later. "Your system uses an old version of the Linux Kernel. Due to a bug in the Linux Kernel, your system may stop responding when writing data to a TrueCrypt volume. This problem can be solved by

Hi all, I set up a samba server into Debian 3.2.0-4-amd64. This runs as guest OS into VirtualBox machine over OS X host OS. Connection seems pretty good: $ iperf -s ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ [ 4] local 192.168.0.21 port 5001

Hi R?my, On 2014/11/5 16:26, GAUGUEY R?my 228890 wrote: > Hi Shannon, > >> Type of backend bandwith(GBytes/sec) >> virtio-net 0.66 >> vhost-net 1.49 >> vhost-net with irqfd 2.01 >> >> Test cmd: ./iperf -c 192.168.0.2 -P 1 -i 10 -p 5001 -f G -t 60 > > Impressive results ! > Could you please detail your

Hi Shannon, >Type of backend bandwith(GBytes/sec) >virtio-net 0.66 >vhost-net 1.49 >vhost-net with irqfd 2.01 > >Test cmd: ./iperf -c 192.168.0.2 -P 1 -i 10 -p 5001 -f G -t 60 Impressive results ! Could you please detail your setup ? which platform are you using and which GbE controller ? As a reference, it would be good also to have